One vertex per element, one color per generator, with an edge from x to x·s.
(3,7)(5,8)(17,18,22,24)(19,21,27,23)(20,25,29,32)(26,30,28,31)(1,2,4,6)(3,5,7,8)(9,10)(11,12)(13,15)(14,16)(17,19)(18,23)(20,28)(21,24)(22,27)(25,30)(26,29)(31,32)(1,3)(2,5)(4,7)(6,8)(9,11)(10,14)(12,15)(13,16)(18,24)(20,29)(21,23)(26,28) involution — undirected(9,12,13,14)(10,11,15,16)(17,19)(18,23)(20,28)(21,24)(22,27)(25,30)(26,29)(31,32)(1,2)(3,5)(4,6)(7,8)(9,12)(10,11)(13,14)(15,16)(17,20)(18,25)(19,26)(21,30)(22,29)(23,31)(24,32)(27,28) involution — undirected(1,3)(2,5)(4,7)(6,8)(9,10)(11,12)(13,15)(14,16)(17,21,22,23)(18,19,24,27)(20,30,29,31)(25,26,32,28)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.